WO2013029860A1 - Film en matière synthétique et capteur tactile - Google Patents

Film en matière synthétique et capteur tactile Download PDF

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Publication number
WO2013029860A1
WO2013029860A1 PCT/EP2012/063607 EP2012063607W WO2013029860A1 WO 2013029860 A1 WO2013029860 A1 WO 2013029860A1 EP 2012063607 W EP2012063607 W EP 2012063607W WO 2013029860 A1 WO2013029860 A1 WO 2013029860A1
Authority
WO
WIPO (PCT)
Prior art keywords
plastic film
transparent
region
conductive
film according
Prior art date
Application number
PCT/EP2012/063607
Other languages
German (de)
English (en)
Inventor
Andreas Ullmann
Walter Fix
Norbert Laus
Haymo Katschorek
Original Assignee
Polyic Gmbh & Co. Kg
Leonhard Kurz Stiftung & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Polyic Gmbh & Co. Kg, Leonhard Kurz Stiftung & Co. Kg filed Critical Polyic Gmbh & Co. Kg
Priority to US14/241,695 priority Critical patent/US9599451B2/en
Priority to CN201280042696.3A priority patent/CN103890702B/zh
Publication of WO2013029860A1 publication Critical patent/WO2013029860A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • the invention relates to a plastic film and a product produced therefrom
  • Touch sensor in particular one consisting of two conductive layers
  • an insulating layer is constructed, as used for example in capacitive touchpads and / or touchscreens.
  • the conductive layers are brought into registry with one another and joined together. Finally, via a bridge, the junctions of the upper and lower conductor tracks, that is to say the y sensors and the x sensors, are merged to form the touch sensor on a
  • the electrically conductive bridge is made, for example, of silver paste, anisotropic conductive adhesive and / or a bonding compound via an ACF (anisotropy
  • Conductive film with a so-called flex-tail, formed.
  • This is a flexible carrier with wiring that carries the connections and that to the conductive ones
  • the Flex-Tail is not transparent, but flexible. It is also possible for both conductive layers to be equipped with a flex-tail, in which case the two flex-tails from the different levels are brought together so that, for example, they fit into a corresponding connector for the evaluation electronics.
  • a disadvantage of the prior art is the necessity of merging the connections from different levels, such as the attachment of the flex tails to the ITO layers, because a high technical and cost-intensive process is realized here.
  • the object of the present invention is therefore to provide a touch sensor and / or a plastic film for the production of a touch sensor, by which the disadvantages of the prior art are overcome.
  • a plastic film which has at least three regions, namely at least a first and second transparent region in which the plastic film has conductor tracks at least on one side, wherein the conductor tracks of the first transparent region are aligned transversely to the conductor tracks of the second transparent region, so that when folding the plastic film along a fold line they form crossing points, and a third area which is between the first and the second transparent area is arranged, and which has the fold line and connecting tracks for connecting the conductor tracks of the first and / or second transparent region.
  • a touch sensor which comprises such a plastic film, wherein the first and the second transparent region are connected to each other via a transparent and electrically insulating layer by folding the plastic film along the fold line, advantageously such that the connection of the conductor tracks of the both transparent conductive and on
  • the fold line comprehensive area is merged on a plane.
  • the invention relates to a plastic film and a touch module produced therefrom, in particular one which is constructed from two conductive layers with an insulating layer between them, as used for example in capacitive touchpads and / or touchscreens.
  • the problem of the connection of the respective x- or y-sensors across two levels is here for the first time solved cost-effectively and mass production.
  • the invention makes it possible that in the touch sensor, the connecting tracks for connecting the conductor tracks, which are arranged on different levels in the touch sensor and in the folding area of the touch sensor, by means of the third area located between the first and second transparent region of the plastic film, the Folding of the plastic film in the touch sensor made from it, can lead from one level to the other. As a result, a connection of the touch sensor is achieved to a transmitter on a single level. This allows a cost-effective production of the touch sensor on the folding and bonding of the plastic film.
  • the invention solves for the first time the problem of wiring, which exists in today's ITO touch sensors, because they always connect two conductive layers of two inflexible substrates on two levels. Here is the high
  • Sensor levels are arranged here on flexible materials.
  • OCA optical clear adhesive
  • the adhesive layer may be on one or both
  • crossing points herein areas are referred to, in which
  • Conductor tracks of different levels which preferably at the location of the
  • Crossing point are electrically isolated from each other, overlapping crossing.
  • "conductive tracks” are preferably structured electrically conductive layers and conductive areas on the plastic film, as are known, for example, from DE 10 2009 014 757 A1, where nets of conductive tracks ("conductors”) are applied to a transparent carrier that in the area of the network sufficient transparency for the human eye is maintained.
  • the thin used preferably smaller 20 ⁇ , more preferably less than 10 ⁇ and particularly preferably smaller 5 ⁇ wide conductors forming the networks, an electrical conductivity is achieved, which is comparable to that of the ITO.
  • the coverage of the transparent carrier with conductive material is preferably less than 20%, more preferably less than 10% and most preferably less than 5%.
  • the conductive tracks of the networks are preferably arranged to form the touch module so that no moire effect occurs, so no additional coarse grid by superimposing the traces of fine networks to the eye appear visible.
  • no moire effect occurs, so no additional coarse grid by superimposing the traces of fine networks to the eye appear visible.
  • interrupted line-shaped or wavy strip conductors and / or their azimuth angle varies.
  • Connecting tracks for connecting the conductor tracks, as well as the connections consist for example of thin wires, metallized layers and / or networks of conductive material on a transparent support.
  • a conductive material a metal z.
  • Charge carriers such as polyaniline, polythiophene and others are used.
  • all connections of the conductor tracks and connecting tracks for connecting the conductor tracks are collected on one level or
  • all the conductive regions and layers, interconnects and connections and connection paths for connecting the interconnects on the film are formed from a single conductive material.
  • a polyolefin such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), Polyester (PE) and / or polycarbonate (PC) or for example of PMMA, polyamide or polyimide.
  • a pure plastic film is also the at least partially use of paper or cardboard or the use of a multi-layer hybrid material is possible, which plastic layers and layers of fiber material, eg. As paper, cotton, or other natural or synthetic fibers, has.
  • Such films also represent plastic films in the context of the present invention.
  • the plastic film consists of a multi-layered hybrid material, which in particular plastic layers and layers of fiber material, for. As paper, cotton or other natural or synthetic fibers.
  • a Hyb dmatehal for example, a plastic film with externally applied paper layers or a fiber layer with the outside
  • plastic layers In this case, in particular opaque
  • Layers in such a multi-layered hybrid material should be recessed in areas to transparent areas in these areas
  • the electrically insulating and - at least in the region of the superposed conductive transparent layers - transparent compound is for example a bond.
  • OCA optical clear adhesive
  • a two-component adhesive can be used, again preferably, in each case one of the transparent regions is coated with a component which then stick together during assembly and in particular react with each other.
  • the adhesive layer may be one-sided, two-sided and full-surface and / or in the decor, d. H. only surface areas are applied to the two conductive layers.
  • the electrically insulating layer has a thickness of 1 to 200 ⁇ , preferably a thickness of 5 to 70 ⁇ and particularly preferably a thickness of 10 to 50 ⁇ .
  • the plastic film also comprises a fourth transparent or non-transparent region which is attached to one of the
  • This embodiment is particularly advantageous when the plastic film is folded with the two sides occupied each other, because then the outer side of the plastic film is not covered with traces. As a result, the conductor tracks located on the inner sides are mechanically protected and, for example, an additional encapsulation can be saved.
  • the folding of the plastic film for example, with a bending radius of 10 to 100 ⁇ .
  • the third region of the plastic film which may be transparent or non-transparent, and which may be reinforced by one or more protective layers, for example, comprises the fold line.
  • the fold line is preferably arranged in a punching region of the plastic film.
  • the plastic film is folded.
  • the fold line is either as long as the edge of a first or second transparent region or it is shorter.
  • the third region has, for example, a gap which completely or partially severs the plastic film. This is particularly advantageous because it can reduce blistering and / or wrinkling when the transparent areas are brought into contact with one another.
  • the three areas may be mutually arranged on one side of the plastic film or on both sides.
  • the vias are then For example, simple holes in the plastic film and / or are placed around the edge.
  • Figures 1 to 3 show possible layouts for plastic films before folding.
  • Figure 4 shows a cross section through a folded plastic film and
  • Figures 5 and 6 show layouts for plastic films before folding.
  • Figure 1 shows the top view of a plastic film in which three areas 2, 3, and 6 are arranged on one side of the plastic film in a punching region 1 of the plastic film and shows the layout before folding.
  • the first transparent region 2 is first seen within a punching region 1 and then the third region 6 located between the first and a second transparent regions 2 and 3.
  • the first transparent region 2 has printed conductors 5 and the second transparent region 3 faces Tracks 10 on.
  • the third region 6 has connecting tracks 7 for connecting the conductor tracks 5.
  • the interconnects 5 form, for example, the x sensors of the touch sensor. To the right of this one can see the second transparent region 3 with the conductor tracks 10, which run from top to bottom, of transparent conductive networks.
  • the conductor tracks 10 form the y-sensors.
  • To recognize further is the direction 9 of the tape for example when
  • the fold line 4 is located in the third area 6, through which the connecting tracks 7 for connecting the conductor tracks 5 run.
  • the transparent regions 2 and 3 are each coated or metallized with conductor tracks 5 and 10.
  • the thickness of the conductive layers is in the range from 5 to 350 nm, preferably from 10 to 300 nm and particularly preferably in the range from 50 to 80 nm.
  • the transparent region 2 comprises the conductor tracks 5 of the x-sensors, whose connecting tracks 7 are guided over the third region 6 with the fold line 4. At a connection 8 all connecting tracks 7 run to the connection of the
  • Conductor tracks 5 and 10 together and can be connected to an evaluation (not shown).
  • the connecting tracks 7 for connecting the conductor tracks 5 are used for the electrical connection of the x-sensors with the
  • the terminal 8 may be a plug, for example.
  • the third area 6 may be transparent or not transparent, and also
  • Figure 2 shows a similar embodiment as Figure 1 only with a slightly different layout, because here are the connecting tracks 7 for connecting the tracks of the x sensors 5 on one side of the third area 6 and not as in Figure 1 in half on both sides of the third Distribute area 6.
  • FIG. 3 again shows a similar embodiment to the first two FIGS. 1 and 2. However, the clearly shortened fold line 4 can be seen here and a gap 11 in the region 6. This embodiment is particularly advantageous for preventing unwanted blistering during folding or folding laminating. and / or to avoid wrinkling.
  • FIG. 4 shows a cross section through a finished touch sensor.
  • the terminals 8 of the touch module lead to a transmitter 13 (not shown).
  • the three interconnects 10 form in the region 3 on the substrate 16 with the
  • The, the y and x sensors forming interconnects 5 and 10 are formed by conductive layers, which are spaced apart by a transparent electrically insulating layer 12.
  • the electrically insulating layer 12 may be an OCA (optical clear adhesive) adhesive, or a two-component adhesive resin or otherwise.
  • This insulating layer 12 is transparent and preferably homogeneous. It may be different systems that are sticky and even after curing still have a sticky surface or not and / or those that cure by UV rays and / or temperature increase.
  • the insulating layer 12 may have a thickness in the range of 10 to 200 ⁇ , preferably from 20 to 100 ⁇ , but also thicker than 200 ⁇ or thinner than 10 ⁇ be.
  • the fold line 4 shows the point where the punching region 1 of the plastic film is folded.
  • a convolution 15 with a bending radius for example, in
  • Range of 10 to 100 ⁇ can lie.
  • the range of the bending radius of the fold 15 is not transparent in the embodiment shown here and the
  • the protective layer 14 may be designed in one or more layers.
  • the protective layer 14 protects the plastic film against mechanical damage or other environmental influences and / or reinforces the region 6 of the fold 15 only optionally.
  • the conductive materials used in the transparent areas 2 and 3 may be present in the fold 15 alone. However, since cracks can easily occur when folding, they are caused by such
  • conductive metals and alloys thereof such as conductive silver, silver paste or organically conductive materials such as PEDOT, PANI, carbon black carbon nanotubes, etc.
  • the protective layer 14 can be printed either locally, in the line decor or over the entire surface. In the case shown here, the protective layer 14 is on the region of the fold 15 or - in short - on the
  • the protective layer 14 can also be applied partially at other locations and / or over the entire punching area 1 of the plastic film.
  • the folding can be carried out in the roll to roll process (R2R) or after cutting as a batch process.
  • R2R roll to roll process
  • the individual steps can be carried out either continuously or discontinuously.
  • the film can be designed as a quasi endless roll.
  • sheets can be separated from the quasi endless roll, which have one or more benefits. Ie.
  • the folding sensors are contained as a single image on the sheet or there are several image units combined on a sheet.
  • the cutting of the labels then takes place directly in accordance with the geometry that the folding sensor has as the end product.
  • Laser cutting or punching processes can also be used for cutting the sheets or labels.
  • the folding through punched holes which are generated for example by means of laser.
  • Figures 5 and 6 show layouts of a plastic film according to embodiments of the invention, in which the punching region 1 is transverse to the direction 9 of the tape. Likewise, the fold line 4 runs here transversely to the direction 9 of the band. It can be seen again, as in the previous Figures 1 to 3 in plan view, the two transparent areas 2 and 3 and in between the area 6, in which the connecting tracks 7 for connecting the conductor tracks and the fold line 4 is located.
  • the interconnects 5 form the x-sensors of the transparent region 2 and the interconnects 10 the y-sensors of the transparent region 3.
  • FIG. 5 again shows an embodiment with a gap 11 in region 6, so that the formation of bubbles and wrinkles is suppressed during folding
  • FIG. 6 shows an embodiment without a gap.

Abstract

L'invention concerne un film en matière synthétique et un module tactile fabriqué à partir dudit film, en particulier un module qui est composé de deux couches conductrices, entre lesquelles est placée une couche isolante, telles qu'elles sont mises en œuvre par exemple pour des pavés tactiles et/ou des écrans tactiles. La problématique de la liaison des capteurs respectifs x ou y par-dessus les deux plans est résolue ici pour la première fois de manière économique et appropriée à la production en grande série.
PCT/EP2012/063607 2011-08-31 2012-07-11 Film en matière synthétique et capteur tactile WO2013029860A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/241,695 US9599451B2 (en) 2011-08-31 2012-07-11 Plastic film and touch sensor
CN201280042696.3A CN103890702B (zh) 2011-08-31 2012-07-11 塑料膜和触摸传感器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011111506.8A DE102011111506B4 (de) 2011-08-31 2011-08-31 Kunststofffolie und Touchsensor
DE102011111506.8 2011-08-31

Publications (1)

Publication Number Publication Date
WO2013029860A1 true WO2013029860A1 (fr) 2013-03-07

Family

ID=46513764

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/063607 WO2013029860A1 (fr) 2011-08-31 2012-07-11 Film en matière synthétique et capteur tactile

Country Status (5)

Country Link
US (1) US9599451B2 (fr)
CN (1) CN103890702B (fr)
DE (1) DE102011111506B4 (fr)
TW (1) TW201310302A (fr)
WO (1) WO2013029860A1 (fr)

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Also Published As

Publication number Publication date
CN103890702B (zh) 2017-08-01
DE102011111506B4 (de) 2017-05-18
TWI562026B (fr) 2016-12-11
US20140218053A1 (en) 2014-08-07
CN103890702A (zh) 2014-06-25
US9599451B2 (en) 2017-03-21
DE102011111506A1 (de) 2013-02-28
TW201310302A (zh) 2013-03-01

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